Microstructural Study on the Wear Behavior of Cu-TiB2 Composites for Electrical Contact Materials

We have studied on the wear behavior of Cu-TiB2 composites, produced by thermal extraction, as a function of dispersed particle sizes and volume fractions of TiB2. The depth of subsurface zone was increased with applied loads from 25 μm with 20 N to 25 μm with 80 N. From the analyses results of the formation of wear debris generated by cracks between work hardened layer and matrix, wear mechanism is changed from abrasive wear to adhesive wear with increasing loads from 20 N to 80 N. The formation of sub-grains in the region of subsurface was clearly observed from the sample tested over 60 N loads. We attribute the formation of sub-grains to the plastic lubricant effect of TiB2 which gives arising from the contact stress and local heat generated during wear test.

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The wear and arc erosion behavior of novel copper based functionally graded electrical contact materials fabricated by hot pressing assisted electroless plating

Advanced Powder Technology ◽

10.1016/j.apt.2021.05.053 ◽

2021 ◽

Author(s):

Onur Güler ◽

Temel Varol ◽

Ümit Alver ◽

Serkan Biyik

Keyword(s):

Electroless Plating ◽

Hot Pressing ◽

Electrical Contact ◽

Functionally Graded ◽

Contact Materials ◽

Arc Erosion ◽

Erosion Behavior ◽

Electrical Contact Materials

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Material transfer behavior of AgTiB2 and AgSnO2 electrical contact materials under different currents

Materials & Design ◽

10.1016/j.matdes.2016.10.056 ◽

2017 ◽

Vol 114 ◽

pp. 139-148 ◽

Cited By ~ 26

Author(s):

Hangyu Li ◽

Xianhui Wang ◽

Xiuhua Guo ◽

Xiaohong Yang ◽

Shuhua Liang

Keyword(s):

Electrical Contact ◽

Material Transfer ◽

Contact Materials ◽

Transfer Behavior ◽

Electrical Contact Materials

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Specification for General Requirements for Wrought Precious Metal Electrical Contact Materials

10.1520/b0476-21 ◽

2021 ◽

Author(s):

Keyword(s):

Precious Metal ◽

Electrical Contact ◽

Contact Materials ◽

Electrical Contact Materials

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Properties of doped Ag–SnO2 electrical contact materials with different SnO2 particle sizes

Materials Research Express ◽

10.1088/2053-1591/aae8fa ◽

2018 ◽

Vol 6 (1) ◽

pp. 016558 ◽

Cited By ~ 1

Author(s):

Wang Haitao ◽

Zhang Mei ◽

Yang Menglin ◽

Wang Jingqin ◽

Zhu Yancai

Keyword(s):

Electrical Contact ◽

Particle Sizes ◽

Contact Materials ◽

Sno2 Particle ◽

Electrical Contact Materials

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Microstructure refinement and physical properties of Ag-SnO2 based contact materials prepared by high-energy ball milling

Science of Sintering ◽

10.2298/sos1302173c ◽

2013 ◽

Vol 45 (2) ◽

pp. 173-180 ◽

Cited By ~ 2

Author(s):

V. Cosovic ◽

M. Pavlovic ◽

A. Cosovic ◽

P. Vulic ◽

M. Premovic ◽

...

Keyword(s):

Metal Oxide ◽

Physical Properties ◽

Ball Milling ◽

Electrical Contact ◽

High Energy ◽

High Energy Ball Milling ◽

Powder Metallurgy Method ◽

Contact Materials ◽

Energy Ball ◽

Electrical Contact Materials

High energy ball milling was used in order to improve dispersion of metal oxide in Ag-SnO2 electrical contact materials. The processed Ag-SnO2 (92:8) and Ag-SnO2In2O3 (87.8:9.30:2.9) powder mixtures were subsequently consolidated to bulk solid pieces by conventional powder metallurgy method. The characterization of the prepared samples included microstructural analysis by XRD and SEM, as well as measurements of physical properties such as density, hardness and electrical conductivity. The results of X-Ray analysis point to reduction of crystallite size after milling of about ten times. Microstructures of sintered Ag-SnO2 and Ag-SnO2 In2O3 materials display very fine dispersion of the oxide components in silver matrix. Somewhat higher uniformity was obtained for Ag-SnO2 In2O3 material which was illustrated by results of SEM analysis and more consistent microhardness values. The obtained values of studied physical properties were found to be in accordance with observed higher dispersion of metal oxide particles and comparable to properties of commercial electrical contact materials of this type.

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